Barely used 29 plus Surly Dirt Wizards. Used these on the front only of a bike, but it slacked the geometry too much. Great option if that is what you are trying to do. Or a great option to run front and back, if your bike has the clearance. They're a bit dirty and there's some Stan's residue inside, but not much.
One is 60 TPI, the other 120. THe 60 is burlier and heavier; the 120 lighter and more supple.

New they are $80-90. $45 for each is what I'm asking.